Scotsman Donald Mackenzie was hunting for the remains of Noah's ark on Mount Ararat in Turkey when he vanished. His family has heard nothing since and several searches by Turkish authorities have failed to find any trace of him. His younger brother Derick, a widowed father of five, travels from Stornoway, Isle of Lewis, across Europe to Dogubayazit, a Kurdish town at the foot of Mount Ararat. The film follows Derick on his journey as he meets many of those who knew his brother who have their own ideas about what might have happened to him.